em•er•ald- 1. a rare variety of the mineral beryl that is green because of its chromium content and is valued as a gem. The Egyptian emerald mines are generally recognized as the first known recorded source of emeralds. However the dates for when this mining began are not clear and their is a huge disparity in terms of beginning dates, with a beginning range of 300-2000 B.C. Emeralds are known for there great value in history, a lot of emeralds are in museums. Emeralds are 7.5 - 8 on the hardness scale. The mineral class of emeralds is beryl, and the luster of it is vitreous. The streak that it llor. Emeralds are said to help strengthen and heal kidneys, and it is also said that it helps remeaves is a whitish coedy circulatory and neurological disorders and eye irritations, and to help eliminate free radicals from the body.Emeralds today are the highest in quality and value of all green gems.
